Thermally Decoupled Air Feed Wall Bushing With Condensation Control
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Solution Overview
Problem
Modern airtight houses face challenges in air supply due to tightness, leading to condensation issues within wall ducts used for ventilation and wood-burning stoves, which can cause damage and unwanted moisture.
Innovation Solution
A supply air wall duct with a central section providing thermal decoupling and featuring flaps or lamellas that can be actuated by a mechanical device to prevent cold air from reaching interior parts, thereby preventing condensation, with the flaps being mechanically coupled within the channel and optionally driven by a motor for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wall duct allows cold air to pass through to the interior, then ventilation and air supply function is improved, but condensation forms on interior parts causing damage and moisture
Solution Approach 1:
The patent applies a movable flap mechanism that can dynamically open or close the duct passage. The flap is actuated by a linkage connected to an actuating device, allowing the system to adapt its state based on operational requirements. When closed, the flap prevents cold air from reaching interior parts and condensing, while when open, it allows air supply functionality.
Solution Approach 2:
The patent introduces a flap as an intermediary element between the cold air flow and the interior parts of the duct. This intermediary can selectively block or allow the passage of cold air, preventing direct contact between the cold air and interior surfaces that would otherwise lead to condensation, while still enabling air supply when needed.
2Ease of operation
If the duct is kept open for air supply, then ventilation is maintained, but cold air cools interior parts to condensation temperature
Solution Approach 1:
The movable flap provides dynamic control over the duct opening, allowing the system to switch between open and closed states. This enables maintenance of ventilation when needed while preventing excessive cooling of interior parts that would lead to condensation, by closing the flap when continuous air supply is not required.
Solution Approach 2:
The actuating device with linkage mechanism provides preliminary action by closing the flap before condensation can form. By proactively controlling the flap position based on anticipated or detected conditions, the system prevents the harmful effect of condensation rather than reacting to it after occurrence.
3Object-affected harmful factors
If a flap mechanism is added to control air flow, then condensation is prevented, but device complexity increases
Solution Approach 1:
The actuation mechanism is segmented into distinct functional components: the flap element, the linkage mechanism, and the actuating device. This segmentation allows each component to be optimized independently and simplifies the overall design by breaking down the complex actuation function into manageable, modular parts that can be manufactured and assembled separately.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents condensation on interior parts by maintaining warmth and ensuring effective sealing, reducing the risk of damage and moisture issues within the duct.
Implementation Method 1
the middle section causing a thermal decoupling of the outside end section and the inside end section
Data Source
Figure 1
Figure 2
Figure 3~6
AI summary
The invention relates to an air supply wall penetration (1) with a channel (2) having an outer end (21) and an inner end (22) for installation in a wall (7) to be penetrated, having an outer side (71) and an inner side (72), wherein the channel (2) is at least partially formed by an inner end section (4), a middle section (5) and an outer end section (3) of the air supply wall penetration, wherein the middle section (5) provides thermal decoupling of the outer end section (3) and the inner end section (4), and that at least one flap (31, 32) or louver is provided in the outer end section (3) by means of which the channel (2) can be closed to the air supply, and that the actuating device (6) for actuating the at least one flap or louver is arranged in or on the inner end section (4). is, wherein the actuating device (6) is connected to the flap(s) (31,32) or lamella(s) is mechanically coupled.,